Grinding-machine



F. H. PERRY. GRINDING MACHINE.

APPLICATION FILED JAN. 22. I9I7.

1,347,656. I E Patented July 27, 1920.

. 4 SHEETS F. H. PERRY. GRINDING MACHINE- APPLICATION FILED ml. 22. 1917.

1,347,656. Patented ly 27, 19 0.

S H HTS-SHEET 2- F. H. PERRY.

GRINDING MACHINE. APPLICATION FILED JAN.22, 1917.

1,347,656. Patented July 27, 1920.

4 SHEETS-SHEET 3.

F. H. PERRY. GRINDING MACHINE.

APPLICATION FILED JAN. 22,1917- Patented July 27, 1920.

1,347,656 4 SHEETSSHEE 1 rllilllll lllllllllll 6 UNITED STATES PATENT. OFFICE.

FREDERICK H. PERRY, 0F BEVERLY, 'MASSAGHUSETTS, ASSIGNGB, BY MESNE ASSIGN- MENTS, TO UN'ITED SHOE'MAGHI'NERY CORPORATION, OFPATERSON, NEW JERSEY,

A conromrxon or new JERSEY.

GRINDING-MACHINE.

Specification of Letters Patent. Patented J l 27 1920 Application filed January 22, 1917. ,Serial No. 143 783.

To all whom it may concern:

Be it known that I, FREDERICK H. PERRY, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certain Improvements in Grinding Machines, of which the following description, in connec-- tion with accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to grinding machines and particularly to a machine adapted for grinding the blades of a heel seat fit: ting machine.

In the manufacture of shoes having wooden heels it is customary to trim oif the edge of the heel portionof the sole of a shoe so-as to permit the upper edge of the heel to extend close to the upper of the shoe. \Vooden heelsare commonly supplied in a finished condition and are provided with a concavity in the upper faces. Accordingly, it is desirable to trim the sole so as to provide aconvex heel seat to conform to this concavity. Machines have been devised for performing this trimming operation and such machines sometimes employ both flat and curved blade knives. having curved edges. One form of such a machine is shown in Letters Patent 1,307,28el, granted June 17, 1919, upon an application of Samuel J. \Ventwoi'th. In the operation of that machine, the central. portion of the heel seat is depressed and afiat knife havinga curved edge is moved from the heel end forwardly over the sole to cut ahorse shoe-shaped piece around the heel seat. The edge of this knife is concave on the same curve as the breastof the heel. An other knife is then moved downwardly against the sole to sever the trimmed portion. When the breast of the heel; is flat, this knife may also be flat but for curved heel breasts the knife is correspondingly curved. In order to prevent cutting into the sole between the trimmededges it may be necessary to provide the curved knife with a concave edge. The latter knife will be seen to' be of similar form to" the heel breasting knives, except that thebevel of its edge is on the convex side. 1

V In order that such machines shallv operate satisfactorily, it is obviously necessary with a plurality of knife holders adapted to be brought individually into operative relation to the grinding element, and then adjusted and moved so as to grind each bladeto a predetermined shape. 7

-A further object is to provide the knife holder support of a grinding machine with a water discharge spout which will act as a gage for positioning the knife in the holder.

g In the drawings,-

Figures 1 and 2 are side elevations of my grinding machine taken from opposite sides of the grinding element;

Fig. 3 is-a plan view taken 'in a direction substantially perpendicular to the plane of the blades to be ground;

. Fig. 4: is a front elevation taken at right angles to theview of Fig. 3; and

Fig. 5 is a plan view similarqto Fig. 3 but with the position of the knife holders interchanged. I

The grinding element, in this case a retary wheel 10, is journaledv in a suitable support 12 and driven from any convenient source of power by means of abelt 1a. .A two-part casing 16 surrounds the grinding element and is provided with an extension 18, which serves as a drip pan, and with an outlet 20. Mounted upon the upper part of the casing is. a water reservoir 22 whose outlet is controlled by means of a cock 24 he'support 12 isiprovided with a forwardly extended slotted bracket 26 to which-is bolted the rearwardly projecting arm of a support. Slidably mounted in a guideway of this armisa portion 80 of the support which is adapted to be moved substantially radially of the grinding element by means of a hand: screw 32 in order to compensate for; the wear of the grinding of the support 30 is provided with a dovetail groove 34 in which is mounted a carriage 36 arranged to slide in a direction substantially parallel to the axis of the grinding element. Movement of the carriage relative to the support may be prevented by the insertion of a pin 38 in an opening corresponding to one in the support. Adjustably mounted upon this carriage is a turret 40 which is adapted to be held in either one of a plurality of positions by means of screws 42. This turret is constructed with an undercut groove 44 in which is adjustably mounted a bolt 52 forming the pivot point of the knife holder 50. The turret 40 has, at one side, an extension 46 extending vertically upward therefrom, which extension is provided with an undercut groove 48 adapted for the reception of the head ofa bolt 72 forming the pivot point of another knife holder 7 O.

The knife holder 50 has a depending member or arm 54 terminating in the blade holder 60 which may be constructed in any convenient manner and will be seen to comprise a clamping thumb screw 62. As here illustrated, the blade holder is particularly designed for the reception of a flat blade 64. Detachably mounted upon the horizontal portion of the support 30 is a discharge spout 66 which, when the support is suitably advjusted by means of the hand screw 32, can

be brought sufficiently close to the grinding element to deliver water in such a manner that it will not be thrown against the operator by the rapidly revolving grinding ele- 'ment. This discharge spout is provided with a lateral extension 68 by means of which it may be connected to the water reservoir 22 through the agency of any suitable device, as for example, a piece of rubber tubing, shown in dotted lines in Fig. 2. A plate 67, mounted upon the pivot bolt 52 and between the knife holder 50 and the turret 40, is provided with a gage mark 69 adapted to cooperate with similar gage marks upon the turret (see Fig. 3) to enable the operator to readily determine the proper position of the pivot bolt 52. The knife holder 50 is provided with an arm 61 extending in an opposite direction from the arm 54 and suping element. This adjustable connection is effected by means of an undercut groove 76 in the arm 74 which cooperates with a bolt 78 in the bearing 80 surrounding the pivot bolt 72. Oscillatory movement of the arm 7 4 relatively to the upstanding portion 46 of the turret may be prevented by means of a pin 82 passing through cooperating openings in the member 46 and the arm 74. The arm 74 of the knife holder is provided at its lower end with suitable blade clamping means 84 in which a slot 86 allows the blade 88 to be adjustably clamped in position. As illustrated, this blade clamping device is adapted for a curved blade.

In order to utilize the machine for grinding a fiat knife with a curved edge, the carriage 36 will be lockedin position by the insertion of the pin 38. The pivot bolt 52 will then be adjusted to a desired position relatively to the grinding, element with the assistance of the gage mark 69 and the blade inserted in the holder 60 and moved forward until its edge touches the spout 66 to thereby determine, by these adjustments, the

the edge shall correspond, for example, to .1

the shape of the heel breast.

If it is desired to use the machine for grinding a flat blade with a straight edge, the pin 63 may be inserted in order to prevent rotation of the knife holder about the pivot point. The removal of the pin 38 will 7 then permit the carriage 36, together with the turret and knife holder, to be moved along the support 30 in a direction substantially parallel to the axis of the grinding element.

. If it is desired to utilize the grinding machine for grinding a curved blade, the turret 40 will be rotated substantially ninety degrees on the carriage 36 and held in its new position (Fig. 5) by means of the screws 42 so that the blade holder 70 will be brought into operative relation to the grinding elcment. This blade holder may now be set in any desired position by loosening the pivot bolt 72 and reclamping it in the groove 48. Obviously, the radius of the knife holder 70 must now be adjusted by moving the bolt 78 in the groove 76 so that the blade will be presented. to the grinding element. If the effective radius of the knife holder is equal to the radius of curvature of the blade 88 then the blade will be ground with a straight edge, that is to say, an edge in a plane perpendicular to the longitudinal axis of the blade. If, however, the radius of the knife holder is greater than the radius of curvature of the blade, the blade must be ground more at the center than at the edge before a cutting edge will be formed all along the blade. This will mean that the blade will be ground with a concave edge. If the radius of the knife holder is less than the radius of curvature of the blade, an opposite result will be obtained and the blade will be ground with a convex edge. It will be apparent that if the blade holder arm 74 is clamped against rotation by the insertion of the pin 82 then the blade holder may be utilized for grinding fiat blades with straight edges by removing the pin 38 and sliding'the carriage 36 transversely of the grinding element.

IVhile I have herein shown and described one particular embodiment of my invention, it is to be understood that various modifications thereof will be apparent to one skilled in the art and, accordingly, I do not wish to be limited to the construction shown but seek to cover in the appended claims all those modifications which come within the true scope and spirit of my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. In a grinding machine, a grinding element, a movable support, and a plurality of knife holders mounted uponsaid support constructed and arranged to clamp the knives in grinding position and to be brought by the movement of the support individually into operative relation to the grinding element, said grinding element and knife holders being constructed and arranged for relative traversing movements in directions to grind each blade edge to a predetermined shape.

In a grinding machine, a grinding element, a support, and a plurality of knife holders mounted thereon said support being movable and constructed and arranged to bring in its movement the knife holders individually into operative relation to the grinding element, one of said knife holders being pivotally mounted upon said support.

3. In a grinding machine, a grinding element, a support, a plurality of knife holders mounted thereon said support being movable and constructed and arranged to bring in its movement the knife holders individually into operative relation to the grinding element, one of said knife holders being pivotally mounted upon said support, and means for adjusting the position of said pivot point relatively to saidgrinding element.

a. In a grinding machine, a grinding element, a support, a plurality of knife holders mounted thereon said support being m vable and constructed and arranged to bring in its movement the knife holders individually into operative relation to the grinding element, one of said knife holders being pivotally mounted upon said support,

and means for adjusting the effective radius of the latter knife holder.

- grinding element.

6. In a grinding machine, a grinding element, a support, a carriage slidably mounted upon said support and arranged to be moved ina path substantially parallel to the aXis of said grinding element, a plurality of knife holders mounted upon said carriage constructed and arranged to be brought individually into operative relation to the grinding element, one of said knife holders being pivotally mounted upon said carriage.

7. In a grinding machine, a grinding element, a support, a carriage slldably mounted upon said support and arranged to be moved in a path substantially parallel to the axis of said grinding element, a plurality of knife holders mounted uponsaid carriage constructed and arranged to be brought individually into operative relation to the grinding element, one of said knife holders being pivotally mounted upon said carria-ge, and means for adjusting the position of said pivot point relatively to the grinding element. j

S. In a grinding machine, a grinding element, a support, a carriage slidably mountednpon said support and arranged to be moved in a path substantially parallel to-the axis of said grinding element, a plurality of knife holders mounted upon said carriage constructed and arranged to be brought individually into operative relation to the grinding element, one of said knife holders being mounted upon said carriage for swinging movement with" a knife 'transand means for locking said carriage rela-' tively to said support.

10. In a grinding machine, a grinding element, a support, a carriage slidably mounted upon saidsupport for movement in a plane transverse to the plane ofthe-grind ing element, a plurality of knife holders movably mounted upon said carriage and adapted to be brought individually into 0perative relation to said grinding element, and means for locking one of said knife holders relatively to said carriage.

11. In a grinding machine, a grinding element, a support, a carriage slidably mounted upon said support for movement in a plane transverse-to the plane of the grinding element, a plurality of knife hold-.

ers movably mounted upon said carriage and adapted tobe brought individually into operative relation to said grinding element, and means for locking either of said knife holders relatively to said carriage.

12. In a grinding machine, a grinding element, a support, a plurality of knife holders mounted upon said support and arranged to be brought individually into operative relation to said grinding element and each mounted for movement in a plane transverse to the plane of the grinding element, one of said knife holders being pivotally mounted thereon.

13. In a grinding machine, a grinding element, a support, a plurality of knife holders mounted upon said support and arranged to be brought individually into operative relation to said grinding element and each mounted for movement relatively to the grinding element, one of said knife holders being pivotally mounted on said support, and means for adjusting the pivot point of said latter knife holder relatively to the grinding element.

14. In a grinding machine, a grinding element, a support, a plurality of knife holders mounted upon said support and arranged to be brought individually into operative relation to said grinding element and each mounted for movement relatively to the grinding element, one of said knife holders being pivotally mounted thereon, and means for adjusting the radius of said latter knife holder.

15. In a grinding machine, a grinding ele ment, a support, a plurality of knife holders pivotally mounted upon said support and arranged to be brought individually into operative relation .to said grinding element, and means for adjusting the pivot points of each of said knife holders.

16. In a grinding machine, a grinding element, a support, a plurality of knife holders mounted upon said support for swinging movement with a knife transversely of the grinding face of said grinding element and arranged to be brought individually into operative relation to said grinding element, and means for varying the arc of knife traversing swing of each of said knife holders.

17. In a grinding machine, a grinding element, a support, a plurality of knife holders pivotally mounted upon said support and arranged to be brought individually into operative relation to said grinding element, means for adjusting the pivot points of each of said knife holders, and means for adjusting the effective radius of each of said knife holders. 7

18. A grinding machine adapted for grinding flat blades having either straight or curved edges which comprises a rotary grinding element,,a carriage arranged to be moved in a path substantially parallel to the axis of the grinding element, means for preventing movement of said carriage, a knife holder pivotally mounted upon said carriage for movement relatively to the grinding element, and means for preventing pivotal movement of said knife holder relatively to said carriage.

19. A grinding machine arranged for grinding both fiat and curved blades which comprises a grinding element, a support, knife holders pivotally mounted. upon said support upon axes at an angle to one another and adapted to be brought individually into operative relation to a grinding element, and means for locking either of said knife holders against pivotal movement.

20. -A grinding machine arranged for grinding both flat and curved blades which comprises a grinding element, a support, knife holders mounted upon said support upon axes at substantially right angles to one another and arranged to be brought individually into operative relation with said grinding element, and means for adjusting the position of one of said axes upon the support relatively to the grinding element.

21. A grinding machine arranged for grinding both flat and curved blades which comprises a grinding element, a support, knife holders mounted upon said support upon axes at substantially right angles to one another and arranged to be brought individually into operative relation with said grinding element, and means for adjusting the effective radius of one of said knife holders.

22. A grinding machine arranged for grinding both flat and curved blades which comprises a grinding element, a support, knife holders mounted upon said support upon axes at an angle to one another and arranged to be brought individually into operative relation with said grinding element, and means for adjusting the position of the axes upon the support relatively to the grinding element.

23. A grinding machine arranged for grinding both flat and curved blades which comprises a grinding element, a support, knife holders mounted upon said support upon axes at substantially right angles to one another and arranged to be brought individually into operative relation with said grinding element, and means for adjusting the effective radius of the knife holders.

24:. A grinding machine arranged for grinding both flat and curved blades which comprises a grinding element, a support, knife holders mounted upon said support upon axes at substantially right angles to one another and arranged to be brought individually into operative relation with said grinding element, means for adjusting the position of the axes upon the support relatively to the grinding element, and means for adjusting the effective radius of the knife holders.

In a grinding machine, a grinding element, a support relatively fixed with relation to said grinding element, means for supplying water to said grinding element comprising a discharge spout mounted upon said support adjacent to the grinding element, a knife holder movably mounted upon said support, said discharge spout acting as a gage for positioning the knife in the holder.

26. In a grinding machine, the combination of a grinding element with a device for supporting a tool to be ground, to allow re ative movement of the tool and grinding element, comprising a support, a secondary support adjustably mounted upon said main support and capable of movement in the plane of the grinding element substantially radially thereof, a carriage mounted on the secondary support for sliding movement transversely of said grinding element, a turret mounted upon said carriage and adapted to be fixed in a plurality of positions, a plurality of knife holders pivotally ing either of said knife holders relatively to the turret, means for adjusting the pivot point of either of the knife holders relatively to the turret, means for adjusting the effective radius of either of the knife holders, and blade clamping means upon said knife holders.

27. In a device of the type described, a support, a rotary grinding element, means for guiding a fiat knife in a predetermined path with relation to said grinding element in order to grind said knife with a curved edge of predetermined radius comprising a pivot point mounted upon said support and adjustable in a plane substantially parallel to the plane of the grinding element, a knife holder mounted upon said pivoted means, and means for adjustably clamping the knife in the holder whereby the radius of curvature of the edge of the blade, as well as the bevel of said edge, may be accurately determined.

28. In a device of the class described, a support, a rotary grinding element, means attachedto said support for grinding flat blades with either straight or curved edges comprising a carriage mounted on said support and slidable in a direction substantially parallel to the aXis of the grinding element, a knife holder pivotally mounted upon said carriage, means for adjusting the position of the pivot point in a plane substantially parallel to the plane of the grinding element, and means for adjustably clamping the blade in the knife holder.

In testimony whereof I have signed my name to this specification.

FREDERICK H. PERRY. 

